Submerged arc furnace lining structure

Abstract

The utility model discloses a submerged arc furnace lining structure, which belongs to the technical field of submerged arc furnace linings, and is characterized in that an inner-layer furnace body is arranged on the inner wall of an outer-layer furnace body, an inner-layer furnace bottom is arranged at the lower end of the inner-layer furnace body, an inner-layer top cover is arranged at a cavity opening at the upper end of the inner-layer furnace body, a U-shaped reinforcing rib is arranged at the lower end of the inner-layer top cover, and a plurality of layers of annular lining layers are arranged in the U-shaped reinforcing rib; the multiple layers of annular lining layers are rapidly installed in the inner layer furnace body through the U-shaped reinforcing ribs. And the outer-layer furnace body and the inner-layer furnace wall adopt annular design and concentric layout, so that the heat conduction path is optimized, and the energy efficiency is improved. The inner-layer furnace lining is formed by combining multiple layers of heat insulation materials, the heat insulation performance is enhanced, and heat loss is reduced. And the T-shaped design of the inner-layer top cover is combined with the U-shaped reinforcing ribs, so that the overall strength and the deformation resistance are improved. And the high-temperature-resistant separation net enhances the connection strength and improves the durability. The furnace lining structure is designed in a modularized mode, the installation period is shortened, and long-term stable operation is guaranteed through the multiple lining layers.

Description

Technical Field

[0001] The utility model relates to the technical field of linings of submerged arc furnaces, in particular to a lining structure of a submerged arc furnace. Background Art

[0002] Submerged arc furnaces utilize electric heating to smelt or heat materials. Their core function is to convert electrical energy into thermal energy. The Joule heat generated by the current in the charge melts the charge and initiates chemical reactions. The structure of a submerged arc furnace primarily consists of the furnace body, electrode system, and short-circuit system. The furnace body is the main component, consisting of the furnace shell, lining, and bottom. The electrode system is responsible for introducing electrical energy into the furnace and includes the electrode shell, electrode paste, and electrode holder. The short-circuit system transmits electrical energy from the transformer to the electrodes, minimizing energy losses.

[0003] However, the multi-layer design of the submerged arc furnace lining presents a significant challenge during installation. This design aims to enhance the lining's high-temperature resistance, corrosion resistance, and thermal insulation, but it also increases the complexity and time-consuming nature of the installation. The installation of a multi-layer lining requires strict adherence to the material, thickness, and placement requirements for each layer, requiring construction personnel to possess exceptional professional skills and extensive experience. Furthermore, meticulous interlayer treatment and joint sealing are essential to prevent thermal stress concentration, material spalling, or gas permeation. These steps not only increase the difficulty of installation but also significantly increase installation time.

[0004] Furthermore, the installation of the multi-layer furnace lining involves extensive material and equipment handling, assembly, and commissioning. Given the massive size and weight of the submerged arc furnace, as well as the potentially harsh environment at the installation site, these tasks undoubtedly further exacerbate the difficulty and time-consuming nature of the installation. Utility Model Content

[0005] The main purpose of the utility model is to provide a lining structure of an electric arc furnace, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A lining structure of a submerged arc furnace comprises a base, an outer furnace body and an inner furnace wall, wherein the outer furnace body and the inner furnace wall are located at the upper end of the base, and the inner furnace wall is located inside the outer furnace body;

[0008] An inner furnace lining is provided between the inner furnace wall and the outer furnace body, and a high temperature resistant isolation net is provided between the inner furnace lining and the inner furnace wall. The high temperature resistant isolation net is used to firmly connect the inner furnace lining and the inner furnace wall through the grid clamping cavity.

[0009] The inner furnace lining includes an inner furnace body and an inner furnace bottom. The inner wall of the outer furnace body is provided with an inner furnace body, and the lower end of the inner furnace body is provided with an inner furnace bottom. The upper end cavity of the inner furnace body is provided with an inner top cover, and the lower end of the inner top cover is provided with a U-shaped reinforcement rib. Multiple layers of annular inner lining layers are provided in the U-shaped reinforcement rib, and the multiple layers of annular inner lining layers are quickly installed in the inner furnace body through the U-shaped reinforcement rib.

[0010] In a preferred embodiment of the present application, the base and the outer furnace body are fixed by fasteners, the outer furnace body and the inner furnace wall are annular in design, and the outer furnace body and the inner furnace wall are concentrically arranged;

[0011] In a preferred embodiment of the present application, the high-temperature resistant isolation net is annular in design, and the side walls of the high-temperature resistant isolation net are provided with transverse rods, which are inserted into the inner furnace body and the inner furnace wall to strengthen the connection between the inner furnace body and the inner furnace wall;

[0012] In a preferred embodiment of the present application, the inner furnace body and the inner furnace bottom are designed as a whole, and the inner furnace body is annular in design. The inner furnace body and the inner top cover are fixed by fasteners. The inner top cover is T-shaped, and the upper edge of the inner top cover is placed on the upper edge of the inner furnace body.

[0013] In the preferred embodiment of the present application, the U-shaped reinforcement rib is designed in a "U" shape, the U-shaped reinforcement rib is fixed on the inner top cover, and multiple U-shaped reinforcement ribs are distributed in an annular manner at the bottom of the inner top cover;

[0014] In the preferred embodiment of the present application, the multi-layer annular lining layer is composed of austenitic stainless steel furnace wall, asbestos board layer, aluminum silicate fiber felt layer and heat-resistant steel furnace wall from inside to outside, and the cavity of the inner furnace body is filled with high-temperature refractory particles.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this utility model, the annular design and concentric layout of the outer furnace body and inner furnace wall optimize the heat conduction path and improve energy utilization efficiency. The multi-layer annular lining design of the inner furnace lining, through the ingenious combination of austenitic stainless steel furnace wall, asbestos board layer, aluminum silicate fiber felt layer and heat-resistant steel furnace wall, greatly enhances thermal insulation performance and effectively reduces heat loss.

[0017] The T-shaped design of the inner top cover, combined with its U-shaped reinforcement ribs, effectively enhances the overall strength and deformation resistance of the furnace lining. The introduction of high-temperature-resistant insulation mesh not only strengthens the connection between the inner furnace body and the inner furnace wall, but also further improves the durability of the furnace lining structure.

[0018] The modular design of the furnace lining ensures tight connections between components and ease of installation, significantly shortening the installation cycle. The selection and design of the multi-layer annular lining fully consider the material's high temperature resistance, corrosion resistance, and thermal insulation properties, further ensuring the long-term stable operation of the furnace lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a side view of the overall structure of the utility model;

[0021] Figure 3 This is a diagram showing the inner lining of the utility model;

[0022] Figure 4 This is a top view of the inner furnace lining of the present invention;

[0023] Figure 5 This is a diagram showing the inner top cover, U-shaped reinforcement ribs and multi-layer annular lining layer of the utility model.

[0024] In the figure: 1. Base; 2. Outer furnace body; 3. Inner furnace lining; 31. Inner furnace body; 32. Inner furnace bottom; 33. Inner top cover; 34. U-shaped reinforcement ribs; 35. Multi-layer annular lining layer; 4. Inner furnace wall; 5. High-temperature resistant isolation net. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1 - Figure 5 As shown in the figure, this design proposes an optimization scheme for the lining structure of an electric arc furnace. The structure is mainly composed of key components such as a base 1, an outer furnace body 2, an inner furnace lining 3 (including an inner furnace body 31, an inner furnace bottom 32, an inner top cover 33, U-shaped reinforcement ribs 34 and a multi-layer annular lining layer 35), an inner furnace wall 4 and a high-temperature resistant isolation net 5.

[0027] The base 1 firmly supports the entire furnace structure, with its upper end supporting the outer furnace body 2 and inner furnace wall 4. Both the outer furnace body 2 and the inner furnace wall 4 are annular in design and arranged concentrically. This layout not only enhances structural stability but also optimizes heat transfer efficiency. Precision fasteners securely connect the two.

[0028] Of particular importance is the ingenious design of the inner furnace lining 3. Positioned between the outer furnace body 2 and the inner furnace wall 4, it provides crucial insulation and protection. The inner furnace body 31 rests snugly against the inner wall of the outer furnace body 2, its lower end naturally extending to the inner furnace floor 32, forming an integrated structure. At the upper opening of the inner furnace body 31 lies a unique inner cover 33. This T-shaped cover cleverly rests on the upper edge of the inner furnace body 31 and is further reinforced with fasteners, ensuring structural integrity.

[0029] To enhance the overall strength and durability of the inner furnace lining 3, multiple U-shaped reinforcement ribs 34 are installed at the lower end of the inner top cover 33. These U-shaped reinforcement ribs 34 are not only U-shaped but also distributed in a circular pattern around the bottom of the inner top cover 33, providing strong support for the entire furnace lining structure. Even more uniquely, multiple layers of annular lining 35 are cleverly embedded within the U-shaped reinforcement ribs 34. These layers, from the inside out, consist of an austenitic stainless steel furnace wall, an asbestos board layer, an aluminum silicate fiber felt layer, and a heat-resistant steel furnace wall. Each layer is carefully selected to maximize the thermal insulation and high-temperature resistance of the furnace lining.

[0030] The introduction of a high-temperature-resistant isolation mesh 5 is the icing on the cake. It also has a ring-shaped design and is cleverly inserted between the inner furnace body 31 and the inner furnace wall 4. Transverse rods on its side walls not only enhance the stability of the isolation mesh but also, by inserting into the inner furnace body 31 and the inner furnace wall 4, further strengthen the connection between the two.

[0031] Finally, the cavity of the inner furnace body 31 is also filled with high-temperature refractory particles. These particles not only improve the high-temperature resistance of the furnace body, but also effectively extend the service life of the furnace lining.

[0032] Through a series of careful designs and optimizations, the lining structure of the submerged arc furnace not only significantly improves the overall performance and durability of the furnace body, but also provides a solid guarantee for the efficient and stable operation of the submerged arc furnace.

[0033] Installation: Place base 1 firmly and steadily in the designated location, ensuring it remains stable and free of movement. Check base 1 for flatness and stability, adjusting or reinforcing as necessary. Lift outer furnace body 2 onto base 1, ensuring the interface with base 1 is smooth and seamless. Use precision fasteners to secure outer furnace body 2 to base 1, ensuring a secure and reliable connection.

[0034] Install the inner furnace body 31: Place the inner furnace body 31 against the inner wall of the outer furnace body 2, ensuring that its lower end naturally extends to the inner furnace bottom 32, forming an integrated structure. Install the inner top cover 33 at the upper opening of the inner furnace body 31. This T-shaped top cover has its upper edge resting on the upper edge of the inner furnace body 31 and is further reinforced with fasteners to ensure a tight structure.

[0035] Installation of U-shaped reinforcement ribs 34 and multi-layer annular lining 35: Multiple U-shaped reinforcement ribs 34 are installed at the lower end of the inner top cover 33, distributed in a circular pattern to provide support. Subsequently, multi-layer annular lining 35 (composed of, in order, an austenitic stainless steel furnace wall, an asbestos board layer, an aluminum silicate fiber felt layer, and a heat-resistant steel furnace wall) is embedded within the U-shaped reinforcement ribs 34, ensuring each layer fits tightly to maximize thermal insulation and high-temperature resistance.

[0036] A high-temperature-resistant isolation mesh 5 is inserted in a circular pattern between the inner furnace body 31 and the inner furnace wall 4. Transverse rods on its sidewalls are inserted into the inner furnace body 31 and the inner furnace wall 4 to enhance the stability of the isolation mesh and strengthen the connection between the two. After the inner furnace lining 3 is installed, the inner furnace wall 4 is hoisted to the inside of the outer furnace body 2, tightly fitting it. Precision fasteners are used to securely fasten the inner furnace wall 4 to the outer furnace body 2, ensuring a tight and seamless connection.

[0037] The cavity of the inner furnace body 31 is filled with high-temperature refractory particles. These particles should be evenly distributed and fill the entire cavity to improve the furnace's high-temperature resistance and extend the life of the furnace lining. The entire installation process must be carried out strictly in accordance with design requirements, ensuring accuracy and stability at every step. After installation, a comprehensive inspection and testing is required to ensure that the overall performance and durability of the submerged arc furnace lining structure meet design requirements.

[0038] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. However, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A lining structure of a submerged arc furnace, comprising a base (1), an outer furnace body (2) and an inner furnace wall (4), wherein the outer furnace body (2) and the inner furnace wall (4) are located at the upper end of the base (1), and the inner furnace wall (4) is located inside the outer furnace body (2), characterized in that: An inner furnace lining (3) is provided between the inner furnace wall (4) and the outer furnace body (2), and a high-temperature resistant isolation net (5) is provided between the inner furnace lining (3) and the inner furnace wall (4), and the high-temperature resistant isolation net (5) is used to firmly connect the inner furnace lining (3) and the inner furnace wall (4) through the grid clamping cavity; The inner furnace lining (3) comprises an inner furnace body (31) and an inner furnace bottom (32); the inner wall of the outer furnace body (2) is provided with the inner furnace body (31), and the lower end of the inner furnace body (31) is provided with the inner furnace bottom (32); the upper end of the inner furnace body (31) is provided with an inner top cover (33), and the lower end of the inner top cover (33) is provided with a U-shaped reinforcement rib (34); a multi-layer annular inner lining layer (35) is provided in the U-shaped reinforcement rib (34), and the multi-layer annular inner lining layer (35) is quickly installed in the inner furnace body (31) through the U-shaped reinforcement rib (34).

2. The lining structure of a submerged arc furnace according to claim 1, characterized in that: The base (1) and the outer furnace body (2) are fixed by fasteners, the outer furnace body (2) and the inner furnace wall (4) are annular in design, and the outer furnace body (2) and the inner furnace wall (4) are concentrically arranged.

3. The lining structure of a submerged arc furnace according to claim 2, characterized in that: The high-temperature resistant isolation net (5) is designed to be annular, and the side walls of the high-temperature resistant isolation net (5) are provided with transverse rods, which are inserted into the inner furnace body (31) and the inner furnace wall (4) to strengthen the connection between the inner furnace body (31) and the inner furnace wall (4).

4. The lining structure of a submerged arc furnace according to claim 3, characterized in that: The inner furnace body (31) and the inner furnace bottom (32) are designed as a whole, and the inner furnace body (31) is designed in an annular shape. The inner furnace body (31) and the inner top cover (33) are fixed by fasteners. The inner top cover (33) is designed in a "T" shape, and the upper edge of the inner top cover (33) is placed on the upper edge of the inner furnace body (31).

5. The lining structure of a submerged arc furnace according to claim 4, characterized in that: The U-shaped reinforcement rib (34) is designed in a "U" shape, and the U-shaped reinforcement rib (34) is fixed on the inner top cover (33), and multiple U-shaped reinforcement ribs (34) are distributed in an annular manner at the bottom of the inner top cover (33).

6. The lining structure of a submerged arc furnace according to claim 5, characterized in that: The multi-layer annular lining layer (35) is composed of an austenitic stainless steel furnace wall, an asbestos board layer, an aluminum silicate fiber felt layer, and a heat-resistant steel furnace wall from the inside to the outside, and the cavity of the inner furnace body (31) is filled with high-temperature refractory particles.

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